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Extracted from: Timberlake P.H., (1958). A Revisional Study of The Bees of the Genus Perdita F. Smith, with Special Reference to the Fauna of the Pacific Coast (Hymenoptera, Apoidea) Part III. University of Caifornia Press Berkeley and Los Angeles 1958, Volume 14, No. 5, pp. 303-410, plates 4-15.
Male.—Head and thorax dark green, the mesoscutum except anterior border and the scutellum black. Undersurface of head, mandibles except reddish tips, labrum, and lateral extensions of clypeus black. Face white below level of antennae, with the green of frons projecting slightly below that level on each side. Cuneate mark on each side of hind margin of disk of pronotum, the collar, and tubercles white. Abdomen blackish, the basal tergites tinged with brown and basal half of venter pale yellowish; tergites 2 to 4 each with a broad yellowish-white band, that on tergite 3 reaching lateral margins, the other two enclosed. Antennae yellow, the pedicel and flagellum brown above, with the two terminal joints dark nearly all around. Legs yellow, the hind femora black except the basal third, and also the hind tibiae except the base on dorsal side. Tegulae yellow at base and hyaline on outer margin. Wings hyaline, the nervures pale testaceous, the subcosta and inner margin of stigma brown.
Head as long as wide, the cheeks somewhat broader than the eyes but receding. Mandibles slender, acute at apex, and reaching somewhat beyond the far margin of proboscidial fossa. Disk of clypeus nearly as high as wide; subantennal plates large, oval, and about twice as long as wide. Antennae long for a Perdita, the joints of flagellum a little longer than thick. Proboscis moderately long, probably in repose not much exceeding proboscidial fossa; maxillary palpi about as long as the labial pair. Wings ample, reaching well beyond apex of abdomen; the stigma about equaling width of first submarginal cell. Head and thorax Bhining, the f rons weakly tessellate and with scattered fine punctures, the mesonotum polished and nearly impunc-tate. Pubescence very sparse, fine, erect, and whitish. Subgenital plate small and narrow, about three times as long as basal width, the apex moderately expanded with two divergent, short blunt lobes. Aedeagus more like that of Carolina than any other species of Alloperdita, with parameral lobes very wide at base, about equaling the height of caulis in lateral view; sagittae very acute at apex in both dorsal and lateral views. Length, 4-4.5 mm.; anterior wing, 3.6-3.8 mm.
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